| ⇦ | 
| ⇨ |
The angle between the vectors (i+j) and (j+k) is
Options
(a) 90⁰
(b) 60⁰
(c) 30⁰
(d) 45⁰
Correct Answer:
60⁰
Explanation:
A = i + j, B = j + k
A . B = |A| |B| cos θ
where θ is the angle between two vectors A and B.
.·. A.B = (i + j).(j + k) = 1
|A| = √(1² + 1²) = √2,
|B| = √(1² + 1²) = √2
.·. cos θ = A.B / |A| |B| = 1/(√2×√2) = 1/2
θ = cos⁻¹ (1/2) = 60⁰
Related Questions: - The radii of circular orbits of two satellites A and B of the earth, are 4R and R
- The voltage of clouds is 4×10⁶ volt with respect to ground. In a lightening
- Radius of first orbit of the electron in a hydrogen atom is 0.53 Å. So the radius
- One way in which the operation of a n-p-n transistor differs from that of a p-n-p
- Core of electromagnets are made of ferromagnetic material which has
Topics: Motion in Plane
(93)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The radii of circular orbits of two satellites A and B of the earth, are 4R and R
- The voltage of clouds is 4×10⁶ volt with respect to ground. In a lightening
- Radius of first orbit of the electron in a hydrogen atom is 0.53 Å. So the radius
- One way in which the operation of a n-p-n transistor differs from that of a p-n-p
- Core of electromagnets are made of ferromagnetic material which has
Topics: Motion in Plane (93)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply